Walrus-class submarine

Class overview
NameWalrus class
BuildersRotterdamsche Droogdok Maatschappij
Operators Royal Netherlands Navy
Preceded by
Succeeded byOrka class
Costƒ500 million per unit (1992)[1]
Built1979–1992
In commission1990–present
Planned6[2]
Completed4
Cancelled2
Active3
Retired1
General characteristics [3][4][5]
TypeDiesel-electric attack submarine
Displacement
  • 2,450 t surfaced,
  • 2,800 t submerged,
  • 1,900 t standard
Length67.725 m (222 ft 2.3 in)
Beam8.40 m (27 ft 7 in)
Draft6.60 m (21 ft 8 in)
Propulsion
Speed
  • 13 knots (24 km/h; 15 mph) surfaced,
  • 21 knots (39 km/h; 24 mph) submerged
Range18,500 km (10,000 nmi) at 9 kn (17 km/h; 10 mph)
Test depth>300 m (980 ft)
Complement49 to 52
Sensors and
processing systems
  • Radars:
  • Signaal/Decca 1229
  • Signaal ZW-07
  • Argo Phoenix I
  • Sonar Systems:
  • Thomson Sintra TSM 2272 Eledone Octopus
  • GEC Avionics Type 2026 towed array
  • Thomson Sintra DUUX 5 passive ranging and intercept
  • Fire-control system:
  • HSA GIPSY (SEWACO VIII)
Armament

The Walrus-class submarine is the only submarine class currently in operation in the Royal Netherlands Navy. The boats have been in service since 1990 and are all named after sea mammals.

  1. ^ Jaime Karremann (2013-03-15). "Hoeveel kost de Onderzeedienst?" (in Dutch). marineschepen.nl. Retrieved 2018-03-18.
  2. ^ Nooteboom (2001), p. 144.
  3. ^ Horneman (2018), pp. 10-12.
  4. ^ van Amstel (1991), p. 59
  5. ^ Nooteboom (2001), p. 182.